Oxidative ring??expansion of benzothiazolines into 1, 4??benzothiazines

…, G Trapani, A Latrofa, P Marchini

Index: Liso, Gaetano; Trapani, Giuseppe; Latrofa, Andrea; Marchini, Paolo Journal of Heterocyclic Chemistry, 1981 , vol. 18, p. 279 - 282

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Citation Number: 8

Abstract

Abstract By treatment in boiling DMSO, benzothiazolines 1 yield 1, 4-benzothiazines 4 in some cases together with benzothiazoles. Two competing pathways, namely oxidative ring- expansion and decomposition of benzothiazoline accounting for the formation of 4 and benzothiazoles, respectively, are suggested.